Remove code duplication in Command.Run functions.

[elhimov]

The vast range of tt commands have almost indentical Run functions. The only variable part is internal module function (marked with uppercase in below code)

Run: func(cmd *cobra.Command, args []string) {
	cmdCtx.CommandName = cmd.Name()
	err := modules.RunCmd(&cmdCtx, cmd.CommandPath(), &modulesInfo,
		INTERNAL_DOWNLOAD_MODULE, args)
	util.HandleCmdErr(cmd, err)
},